Track URLRequestContext references in a set.

net/url_request/url_request_context.cc

Index: net/url_request/url_request_context.cc
diff --git a/net/url_request/url_request_context.cc b/net/url_request/url_request_context.cc
index e42d46536b0c5e052e51143d654283de0ce3fdf8..51a6dbf7366d6fc292d49763c3a3c7032b9eb2b6 100644
--- a/net/url_request/url_request_context.cc
+++ b/net/url_request/url_request_context.cc
@@ -5,11 +5,13 @@
 #include "net/url_request/url_request_context.h"
 
 #include "base/compiler_specific.h"
+#include "base/debug/alias.h"
 #include "base/string_util.h"
 #include "net/base/host_resolver.h"
 #include "net/cookies/cookie_store.h"
 #include "net/ftp/ftp_transaction_factory.h"
 #include "net/http/http_transaction_factory.h"
+#include "net/url_request/url_request.h"
 
 namespace net {
 
@@ -28,7 +30,8 @@ URLRequestContext::URLRequestContext()
       ftp_auth_cache_(new FtpAuthCache),
       http_transaction_factory_(NULL),
       ftp_transaction_factory_(NULL),
-      job_factory_(NULL) {
+      job_factory_(NULL),
+      url_requests_(new std::set<const URLRequest*>) {
 }
 
 void URLRequestContext::CopyFrom(URLRequestContext* other) {
@@ -63,6 +66,17 @@ const std::string& URLRequestContext::GetUserAgent(const GURL& url) const {
 }
 
 URLRequestContext::~URLRequestContext() {
+  int num_requests = url_requests_->size();
+  if (num_requests != 0) {
+    // We're leaking URLRequests :( Dump the URL of the first one and record how
+    // many we leaked so we have an idea of how bad it is.
+    char url_buf[128];
+    const URLRequest* request = *url_requests_->begin();
+    base::strlcpy(url_buf, request->url().spec().c_str(), arraysize(url_buf));
+    base::debug::Alias(url_buf);
+    base::debug::Alias(&num_requests);
+    CHECK(false);
+  }
 }
 
 }  // namespace net